iwc 3769 Mode D'emploi page 31

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When attaching the bracelet, you must ensure that
the horns are securely engaged to prevent the bracelet
coming off your arm unintentionally.
How often should my watch be serviced?
The optimal service cycle for your IWC timepiece is exclusive
to your watch and unique lifestyle. The
necessary interval between services will be determined by
your individual wearing habits; frequency of wear, your
environment/s, and the intensity of physical activity you
engage in. Your fine mechanical timepiece is an extension of
yourself and will run well for as long and smoothly as it is
treated. Therefore, we simply recommend you to continue
wearing your watch for as long as pleases you and to only
entrust it for a service if you notice a deviation from the
regular performance, function or timekeeping. It will then be
our pleasure to reinstate the premium performance with the
suitable service.
Effective from January 2009.
Technical specifications subject to change.
To attach the bracelet, push down
the two sides of the horns vertically
towards the lower side of the case
and into the recesses (3) until you
hear and feel the retaining lever
engage.
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